package com.itguigu.glimail.order.config;

import feign.RequestInterceptor;
import feign.RequestTemplate;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;

@Configuration
public class GliFeignConfig {
    @Bean("requestInterceptor")
    public RequestInterceptor requestInterceptor() {
        return new RequestInterceptor() {
            @Override
            public void apply(RequestTemplate template) {
                //1拿到刚进来的请求
                ServletRequestAttributes requestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
                if (requestAttributes!=null) {
                    HttpServletRequest request =
                            requestAttributes.getRequest();//老请求
                    //同步请求头数据  主要是cookie
                    if (request != null) {
                        String header = request.getHeader("Cookie");
                        template.header("Cookie", header);//给新请求同步了老请求  解决丢失请求头
                        System.out.println("feign远程调用之前先进行RequestInterceptor.apply");
                    }
                }
            }
        };
    }
}
